This one was recently sold and brought (assumingly by ebay seller) at an auction. Regretably i couldnt attend myself and missed seeing it. I am awaiting a reply from seller but it certainly looks interesting?

The latest (which went unsold, with no bids) is a standard Allen & Unwin internal memo of the period. We've seen many examples. Nor do we have any problem with the signature and date on the verso being in Tolkien's hand. The event to which Tolkien was driven on 14 July 1972, at the Allen & Unwin offices and warehouses at Hemel Hempstead, is mentioned in our Chronology, p. 765, and in Letters, p. 421.

Thanks Wayne & Chistina I took a punt and brought it. I knew it had come from the son of the driver and with a few enquiries as well I was fairly confident (although I did miss the letters entry) it was genuine. Awaiting its arrival. I always said I wouldnt bow to buying signature as overpriced but there you go.